Read this again
" but this is just MY taste which is certainly not the norm.
She is gorgeous and the shots are all good, but you asked for a favorite.
This is a relative thing - it is hard to choose one of these images as THE BEST as you asked for. When I compared them I found myself liking number 4. When I wonmdered why I like 4 better I then tested (copied your image into my editor and converted some to black and white). I of course do not save your images but did this to check the contrast. Number 4 came up looking best in black and white (to my eyes). Simple as that. I wanted to figure out what it was that atracted me to this iamge. When I understand why I like one of yours better than others of yours I learn a little more about my own photography.
I display all images on my site in black and white and color in order to demonstrate that a good image is great viewed either way. This is because there ae lots of people who beleive that you must shoot black and white film (purists) in order to obtaina good black and white shot.
Sometimes I have to drop a image from a gallery because it does not take to this conversion well.
My remarks are not critisism of the remaining images. You cannot add contrast, but that does not make them failures, just maybe not as good as the one I chose (((In my opinion)))
My opinion of your work is not worth squat by the way - it is your opinion of your work you must worry about.